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Blower runs constantly but the heat is working

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Sounds like a broken switch or stuck relay. Relays are usually in the fuse block

Posted on Jan 15, 2013

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Blower motor works when i hit a bump, whats wrong


Blower motor faulty, or faulty blower motor switch. 90% sure its a blower motor that has bad brushes. Brushes are what sends voltage from the wires to the shaft, which creates a magnetic field that will make the shaft want to turn. The brushes are in constant contact with the contacts on the blower shaft. Over time, being in constant contact with a moving part, the brushes will wear down untill there is nothing left but the springs that hold them in place. The springs don't contact the shaft fully, but can run the motor once its givin a kickstart. A bump is doing just that, giving your blower motor a kickstart to run. A loose connector will do this but its very uncommon for a connector to just come loose on its own. A loose connector will intermittenly connect when jostled, bumped, or wiggled.

Dec 15, 2013 | Ford Expedition Cars & Trucks

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Hi guys I am new on this, I will start all over, I got this big problem for me, I got this 2002 huyndai elantra gt, 1 week ago I was driving and the heat stopped working, no radiator leak, everything...


Ok, here is my take on your problem. As you may already know, it takes a car a few min. to actually warm up to operating temp. When the coolent reaches operating temp. the thermostat opens to circulate the coolent in the radiator. Now, as your drive, the air pushing against your car will actually blow some air through your heating system ducts and into the passenger compartment. Is it possible that your blower fan isn't working? Because while you are stopped, there would be no air forcing its way through your ducts, thus no heat. As your drive, your car gets up to operating temp, heats up, and the air pressure as your drive will blow some heat out into the passenger compartment? On a side note, if your thermostat is stuck in the open position, it would take it forever to warm up since it is circulating ALL the coolent even tho it isn't at operating temp. A thermostat stuck open will take 30 min or more before you actually feel any warmth, if at all in the winter.. your thermostat opens and closes constantly as the engine is running to keep it at its normal temp, usually around 160-180 degrees. If you live where it gets really cold, a thermostat stuck open likely will never get warm. If your blower motor works, and your engine don't overheat, im 98% sure its your thermostat.

Dec 05, 2013 | Cars & Trucks

2 Answers

2003 GMC Envoy main blower fan runs constantly


Does the fan stay on even with the ignition key off? Do you have automatic heating and air conditioning controls? Automatic controls have a light up blue screen in the middle of the temperature controls, and there will be a button that says "Auto". If you do have automatic controls, the likely culprit of your fan staying on constantly is what is called the blower control processor. The blower control processor is a small computer that replaces the blower resistor commonly found in cars. When the blower control processor fails, it usually "sticks" on. It's not a cheap part, but is easy enough to replace if you're handy with basic hand tools and comfortable unplugging electrical connectors under the glove compartment area.

Oct 14, 2013 | 2003 GMC Envoy

1 Answer

2002 cavalier, heat but blower not running


you may have a bad blower motor or bad resitor

Jan 24, 2013 | 2002 Chevrolet Cavalier Coupe

1 Answer

2004 blower moter keeps running


i would replace the blower motor relay .sounds like its stuck in the closed postion, normanlly it in the open . if you have a owner manual go to the index and look at relays ,locate relay pull it out and if it stops the blower with the key off its probally your problem..

Aug 05, 2012 | 2004 Chrysler Pacifica

1 Answer

2002 Dodge Grand Caravan 3.8 V6, will not blow heat constantly. The heat blows off and on. I replaced the thermostat and the blower motor and dials are working. A/C is working but can't get constant...


Sounds like one of the vacuum doors under the dash are not working right check the doors and check for vacuum leaks in the hoses or the door actuators malfunctioning

Sep 28, 2011 | 2002 Dodge Grand Caravan

1 Answer

Heater won't go off


Hi,

If you're referring to the heater "FAN" running continuously, then its likely to be your blower motor resistor.

The heater blower motor (under the dash) has constant power supplied from the battery, but is controlled by the blower "resistor" - usually mounted on the blower motor assembly. If one or more of the blower resistor coil wires are faulty, the motor will either not work on one of the fan settings, or will constantly run by itself.

Jun 08, 2011 | 1984 Mercury Grand Marquis

1 Answer

I have a 1997 Cadillac deville my car will not blow out heat from the AC... I can feel warm air seeping out mg the vents but not blowing. I checked the blower motors fuse and its OK....is it my blower...


More than likely it's blower motor of blower relay. GMs are notorious for blower motor failures because they're running constantly when engine is on. (If you'll note there is NO off position just low to hi)

Feb 21, 2011 | 1997 Cadillac DeVille

2 Answers

Cabin blower runs constantly, even if car is off. 1999 saab 9-3 se


the motor has a permanant feed the reostat is controled by the earth via the switch ,something has packed up between the switch and the reostat

Mar 11, 2010 | 2004 Saab 9-3

2 Answers

Heater blower switch only works in postions 3 and 4


When this happends, it usely is caused by a bad blower motor resister. I can't tell you if it is a seperate unit or if its built into the blower motor . If its a seperate unit it should be located close to the blower on the heater box, if its in the motor you will have to replace the motor.

Sep 16, 2009 | 2004 Ford F150

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